Question

Q.7.Pollen grains of other flowers germinate
rapidly over the stigma than the pollen grains from the same flower.This outbreeding device seen in angiosperms is known as --- .

Answer 1

Answer:

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Explanation:

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Answer 2

Explanation:

$\huge\mathtt\red{Answer}$

→It is a thin and continuous layer of pollen grain which encloses the PM of a cytoplasm.

→It is made up of cellulose and pectin.

→A newly differentiate and Pollen Grain has a central nucleus and cytoplasm.